Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9828829 | Intermediate completion assembly for isolating lower completion | Jeffrey S. Phillips, Roy N. Nelson, Donald P. Lauderdale | 2017-11-28 |
| 9027651 | Barrier valve system and method of closing same by withdrawing upper completion | Jeffrey S. Phillips, Roy N. Nelson, Donald P. Lauderdale | 2015-05-12 |
| 9016372 | Method for single trip fluid isolation | Jeffrey S. Phillips, Roy N. Nelson, Donald P. Lauderdale | 2015-04-28 |
| 9016389 | Retrofit barrier valve system | Jeffrey S. Phillips, Roy N. Nelson, Donald P. Lauderdale | 2015-04-28 |
| 8550172 | Plural barrier valve system with wet connect | — | 2013-10-08 |
| 4887931 | Method and apparatus for towing subsea pipeline sections | George E. Conover | 1989-12-19 |